MECHANICAL [SKYACTIV-G 1.3, SKYACTIV-G 1.5]

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Outline

•  For SKYACTIV-G 1.3 and SKYACTIV-G 1.5, the sliding resistance*1 has been reduced by the following.
―  Adoption of a rocker arm (built in needle roller bearing)
―  Reducing the valve spring load
―  Narrowing down the crankshaft journal
―  Optimizing the piston skirt shape
―  Adoption of a low-tension piston ring
―  Lowered tensioning of the drive belt
•  A maintenance-free design for valve clearance has been achieved with the adoption of the HLA.
•  With the adoption of a piston cavity, cooling loss has been reduced.
•  A variable valve timing mechanism has been adopted on the intake side, reducing the pumping loss*2. (Without coolant control valve (4-1 exhaust system))
•  The pumping loss*2 has been reduced with the adoption of the variable valve timing mechanism on both sides of the intake and exhaust. (Without coolant control valve (4-2-1 exhaust system), with coolant control valve)
•  The timing chain behavior has been stabilized and sliding resistance has been reduced by optimizing the shape and rigidity of the timing chain-related parts.
*1  :Resistance (friction force) which occurs when two object slide against each other. The larger the sliding resistance, the greater the energy loss.
*2  :Energy loss which occurs from each type of resistance corresponding to intake and exhaust is called pumping loss.

Structural View

Without coolant control valve (4-1 exhaust system)

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Without coolant control valve (4-2-1 exhaust system), with coolant control valve

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Structure

•  Consists of the following parts:

Cylinder head cover
(See CYLINDER HEAD COVER [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Cylinder head
(See CYLINDER HEAD [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Cylinder head gasket
(See CYLINDER HEAD GASKET [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Cylinder block
(See CYLINDER BLOCK [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Crankshaft
(See CRANKSHAFT, MAIN BEARING [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Piston
(See PISTON, PISTON RING, PISTON PIN [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Connecting rod
(See CONNECTING ROD, CONNECTING ROD BEARING [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Engine front cover
(See ENGINE FRONT COVER [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Crankshaft pulley
(See CRANKSHAFT PULLEY [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Drive belt
(See DRIVE BELT [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Valve mechanism
(See VALVE MECHANISM [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Valve
(See VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
HLA
(See HYDRAULIC LASH ADJUSTER, ROCKER ARM [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Camshaft
(See CAMSHAFT [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Timing chain
(See TIMING CHAIN, CHAIN TENSIONER [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Variable valve timing mechanism (SKYACTIV-G 1.3, SKYACTIV-G 1.5)
(See VARIABLE VALVE TIMING MECHANISM [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
OCV (SKYACTIV-G 1.3, SKYACTIV-G 1.5)
(See OIL CONTROL VALVE (OCV) [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Hydraulic variable valve timing actuator (SKYACTIV-G 1.3, SKYACTIV-G 1.5)
(See HYDRAULIC VARIABLE VALVE TIMING ACTUATOR [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)
Variable valve timing mechanism (SKYACTIV-G 1.5)
(See VARIABLE VALVE TIMING MECHANISM [SKYACTIV-G 1.5].)
OCV (SKYACTIV-G 1.5)
(See OIL CONTROL VALVE (OCV) [SKYACTIV-G 1.5].)
Hydraulic variable valve timing actuator (SKYACTIV-G 1.5)
(See HYDRAULIC VARIABLE VALVE TIMING ACTUATOR [SKYACTIV-G 1.5].)
Electric variable valve timing actuator (SKYACTIV-G 1.5)
(See ELECTRIC VARIABLE VALVE TIMING ACTUATOR [SKYACTIV-G 1.5].)
Electric variable valve timing relay (SKYACTIV-G 1.5
(See ELECTRIC VARIABLE VALVE TIMING RELAY [SKYACTIV-G 1.5].)
Engine mount
(See ENGINE MOUNT [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)